Metallic ball-head hinge for nonmetallic spectacle-frames



July 14, 1931. H. HAAsE- 1,8145032 IETALLIC BALL HEAD HINGE FIOR NONIETALLIC SPECTACLE MES med July s, 192ev Patented July 14, 1 931 r-'Flc-E I l HEINRICH Haasn, or BATHENOW, GERMANY METALLIC BALL-HEAD HINGE ron.

NoNMErALLIc suenan-'ruime Application led `uly 3, y1928, Serial No. 290,168, and ian Germany November 8,'1 9`,`27. i

Metallic ball-head hinges for non-metallic spectacle frames have been manufactured up to now in this manner thatveach half of the hinge isprovided with an angularlug and with a pin located upon this lug, these two members ybeing then inserted into the frame vmembers to be hinged to one another. Connecting the spectacle parts by hinges of that type necessitates that, prior thereto, cavities corresponding to the hinge-parts must be provided in the frame material, as otherwise dead play can arise at the cornered lug whlch may have the consequence of the holding bows becoming loose.

This drawback is overcome by the presentl invention, the characteristic feature of which resides therein that for the cornered lug with its fastening pin is substituted a vaulted shield, the circumference of which isv practically circular and has recesses or gaps at only a few places. This shield is attached to the hinge parts and firmly con/- nected with them by solder. Prior to attaching the hinge parts With said `vaultedshields to the parts concerned of the spectacle frame, said parts are provided with circular shallow cavities, each of which is just large enough to receive one of said shields. When the shield has been inserted into the appertaining cavity, it is subjected to a pressure of such a strength that it assumes' a flat shape, that is to say, is transformed into a not as yet pressed.at; and Figure gis-a similar representation', showing "a complete hinge connected with the appertai'ning spectacle frame parts, the insertedl plates being here already in their flat, i. e. ultimate, state. 65,'

All igiires are drawn to an enlarg'ed'scal'e.l

On the drawings', 1 denotesV a art ofthel spectacle frame body, 2 a part o a holding bow,V 3 a hinge, 4 a screw connecting the y hinge members with one another, 5 the 60 'vaulted shield, or the flat plate intov which the shield has been transformed respectivel and 6 are recesses provided lin the rim of said shield or plate.

I- claim: Y

A metallic hinge for non-metallic and recessed spectacle frames comprising a hinge member;v and a dish-shaped elastic plate 'se` cured to the hinge member 'having Iradial projecting members adapted forced into the recess of the frame of the spectacle whereby due to theelasticitj1 of the plate the dish shape will ,j omeiat shaped to firmly secure the hinge y means of the disk, in consequence whereof i-ts diameterl becomes slightly larger and its rim with its edge is. pressed into the spectacle material whereby the parts are firmly connected with one another. lThe working time is by far shorter than hitherto, less material isrequired, andthe hinges'ar'e very securely connected with the frame body, as well as withv the holding bows. These latter are, under normal conditions, absolutely prevented,v

from getting loose.

The invention is illustrated' diagrammatii cally'and by way of example on the accompanylngdrawings, on which Figure 1 is a plan of one of the vaulted -shields insertedy into a spectalepart, Figure 2 is a section through a spectacle part and a hinge, the .vaulted plate yinserted into saidpart being projecting members in and to theframe. In testimony whereof I aix mysignature.

- HEINRICH HAASE.

to bev laterally "i9l 

